<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset=utf-8">
		<title>Document</title>
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	<body>
	<a href="./pin?light=on"><input type="button" value="开灯"></a>
	<a href="./pin?light=off"><input type="button" value="关灯"></a>
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</html>

